CN117163230A - Low Wen Yehuo storage cabin based on supporting system - Google Patents

Abstract

The invention discloses a low Wen Yehuo storage cabin based on a supporting system, which comprises a cuboid frame, wherein the cuboid frame is supported by a peripheral frame in a ship body of the ship cabin, and four side surfaces and top surfaces are connected with a plurality of first supporting slide ways in a divergent mode; the first support slideway is fixed with the inner wall of the ship body through welding; each first support slideway is parallel, and a second support slideway is arranged inside the cuboid frame; the second support slideway is connected with a film bulkhead for bearing the low-temperature liquid; a plurality of insulating support assemblies are arranged between each group of parallel first support slide ways and second support slide ways at intervals. The support ramp and insulating support assembly of the present invention allows the low Wen Yehuo tank to move relative to the hull when the low Wen Yehuo tank is subjected to temperature changes and sloshing of the liquid in the tank. The flexible bulkhead, support ramp and insulating support assembly can relieve stress and bear load, while the internal insulating components avoid transferring low temperatures of the hull to the hull.

Description

Low Wen Yehuo storage cabin based on supporting system

Technical Field

The invention relates to the field of ship manufacturing, in particular to a design of a thin film type low Wen Yehuo storage cabin.

Background

At present, a cargo containment system commonly used for shipping transportation and storage of low-temperature liquid cargo is mainly a thin film type and an independent type, the thin film type cargo containment system is completely attached to an inner hull shell through welding and adhesion, no holding force is provided, static pressure and dynamic pressure generated by the content of a cargo hold are transmitted to the inner hull shell through an insulation system, and the inner hull shell keeps the integrity of the cargo hold. And the main screen is usually made of stainless steel or invar corrugated board with a thickness of not more than 10mm, and is light in weight. The independent cargo containment system is arranged on the inner shell of the ship body through the base and has self-holding force. The main screen is typically made of 9% nickel steel or aluminium alloy, typically 30-60mm thick, capable of withstanding static and dynamic pressure loads and thermal stress changes, and the insulating material is typically coated on the outside of the main screen. But due to the film type cargo enclosureThe system is closely attached to the ship structure, the cargo containment system and the ship are built simultaneously, the whole building period is long, and the tightness of the system is greatly dependent on the operation level of an installer. There is no overhaul space between the inner hull and the cargo hold, so that about 5 years of overhaul of the empty cargo hold is needed to be carried out in the cargo hold, and the ship operation is affected. The corrugated plate structure is strong in flexibility and weak in rigidity, and the corrugated plate collapses to lose efficacy in consideration of attack caused by free liquid level sloshing of the cargo hold in the sailing process of the ship, so that the filling rate of the cargo hold is limited to be less than 10% H or higher than 70% H at present, and the transportation route of the ship is influenced. The cargo containment system, although having a service space and being constructed separately from the hull, has a large thickness of the cargo compartment bulkhead because the main screen wall thereof needs to have a sufficient strength, so that the overall weight and construction cost are increased. For 13000m ³ The type B independent compartment of (2) has a weight of about 1100t for 25000m ³ The weight of the GTT MARKIII FLEX membrane module is about 460t.

According to IGC CODE International regulations on construction and equipment for bulk transport of liquefied gas vessels, semi-thin film cargo tanks refer to cargo tanks that are not self-supporting under loading conditions, and the design vapor pressure should generally not exceed 0.025MPa. When subjected to low temperature and low temperature (LNG-161 degrees celsius) temperature changes, the semi-membrane tank material expands and contracts therewith, so that the semi-membrane tank needs not only a strong structure with rigidity as a skeletal support, but also to allow relative movement of the tank and the hull.

At present, only a semi-membrane liquid cargo containment system based on a B-type cabin by Kawasaki heavy workers in 1969 is applied to a real ship, but the whole cabin body is supported by laminated wood, the whole cabin body is contracted towards the cabin top when the temperature changes, gaps are formed between the cabin bottom and the cabin wall and between the cabin wall and the ship body, the support cannot be realized, the friction resistance between the cabin body and the ship body is large, stress concentration is easy to occur, and the later stage has no real ship performance.

Disclosure of Invention

In order to solve the problems, the invention provides a low-temperature liquid cargo storage cabin and a supporting system thereof, wherein the side surface and the top surface of the low-temperature liquid cargo storage cabin are composed of a plurality of groups of fan-shaped and arc-shaped flexible bulkhead parts, and a fan-shaped expanding supporting slideway taking a solid collecting end as a center is arranged between each two flexible bulkhead parts and is connected with a fixed supporting slideway of a hull end through an insulating supporting component. The support skid and insulating support assembly allow the low Wen Yehuo tank to move relative to the hull when the low Wen Yehuo tank is subjected to temperature changes and sloshing of the tank liquid. The flexible bulkhead can release the stress vertical to the side surface and the top surface of the cabin body, bear the cyclic fatigue load caused by the thermal load, and the support slideway and the insulating support component can release the stress along the fixed center direction and transfer the static load and the dynamic load generated by the liquid pressure in the cabin. The insulating support assembly comprises an insulating part, a connecting piece, a sealing plate, a joint kinematic pair formed by balls and rollers, not only enhances the structural strength of the flexible cabin body, but also bears the load, can adapt to the stress change of contraction and expansion of the cabin wall, reduces the movement resistance between the cabin wall and the ship body, reduces the abrasion, prolongs the service life of the sliding assembly, and the insulating part inside avoids the low-temperature transmission of the cabin body to the ship body.

In order to achieve the above purpose, the invention provides a low Wen Yehuo storage cabin based on a supporting system, which comprises a cuboid frame supported by a peripheral frame in a ship body of the ship cabin, wherein four side surfaces are connected with a plurality of first supporting slide ways in a fan-shaped divergent mode upwards by taking a bottom line center as a fixed collecting end; the plurality of first support slideways are connected in a divergent manner to the periphery of the top surface, which takes a rectangular central line as a fixed collecting end;

the first support slideway is fixed with the inner wall of the ship body through welding; the inner wall of the ship body comprises upper and lower surface cloth insulating material layers except the first supporting slideway position;

each first support slideway is parallel, and a second support slideway is arranged inside the cuboid frame; the second support slide way is connected through an arc-shaped or rod-shaped connecting beam at a corner to form an internal cuboid structure, and a plane or an arc-shaped metal plate is arranged between the second support slide way and the connecting beam so as to wrap the cuboid structure;

the second support slideway is connected with a film bulkhead for bearing low-temperature liquid; a plurality of insulating support assemblies are arranged between each group of parallel first support slide ways and each group of parallel second support slide ways at intervals; each insulating support component is a sliding block matched with the first support slideway and the second support slideway respectively, and is connected into a whole through a plurality of insulating parts by connecting pieces; the solid collecting end of the top surface is provided with a gas-liquid combined dome.

Preferably, rolling friction balls or balls are arranged on the surfaces of the first support slide rail, the second support slide rail and the insulating support assembly, which slide relatively. The balls or balls are sealed in the insulating support assembly through a sealing plate.

Under the preferred mode, first support slide or second support slide, the tie beam is selected from stainless steel, 9% nickel steel, high manganese steel, aluminum alloy low temperature resistant metal material.

In the preferred mode, the lower part of the cuboid structure of the film cabin extends out of the cuboid frame in the ship body, and the bottom of the cuboid structure is seated on a deck of the ship body; the lower inclined surface of the cuboid structure, which is positioned at the bottom surface and the corners of the lower part, is a metal plate with the thickness of 12-20 mm. The top surface, the side surface and the upper corner of the cuboid structure are made of metal plates or arc-shaped metal plates with the thickness of 6-10 mm. Preferably, for 50000m ³ Each arc plate has a chord length of 3-5m.

The invention has the beneficial effects that:

1. the cryogenic liquid cargo tank is subject to temperature variations and sloshing of the tank liquid, and the support skid and insulating support assembly allow the low Wen Yehuo tank to move relative to the hull. The flexible bulkhead can release the stress vertical to the side face, the dihedral angle and the dihedral angle of the top face of the cabin body, bear the cyclic fatigue load caused by the thermal load, improve the complex stress condition of the insulating support assembly, and release the stress in the fan-shaped expanding direction taking the solid collecting point as the center and transfer the static pressure and dynamic pressure load caused by the liquid in the cabin. The connecting beam increases the bearing capacity of dihedral and dihedral areas and improves the safety of the whole cabin.

2. Each deck of low Wen Yehuo stores up the cabin and uses solid collection end as the shrink center, and insulating support subassembly is the arrangement scheme of fan-shaped expansion formula, can make the expansion shrink of the low Wen Yehuo of adaptation store up the cabin change, reduces the stress concentration situation of each strong point, uses solid collection end as central insulating support subassembly to arrange from close to loose simultaneously, makes the great low Wen Yehuo of load store up cabin bulkhead lower extreme and has better supporting strength.

3. The insulating support component of the low Wen Yehuo storage cabin support system is a combined kinematic pair consisting of insulating components, connecting pieces, sealing plates, balls and rollers, so that the structural strength of the flexible cabin body is enhanced, heat insulation is carried, and free loading of liquid in the cabin can be met. And can adapt to the stress variation of the contraction and expansion of the bulkhead, reduce the movement resistance between the bulkhead and the hull, reduce the abrasion, reduce the material fatigue and prolong the service life of the sliding component.

4. The low Wen Yehuo storage cabin can overcome the defects of the independent cargo enclosure system in terms of weight and cost due to the fact that the thickness of the storage cabin is reduced, and meanwhile, the storage cabin brings great convenience for later inspection and maintenance due to the fact that a walk-in space exists between the ship body and the cabin body, and the defects of the thin film cabin are overcome.

Drawings

Fig. 1 is a three-dimensional view of the cryogenic liquid cargo tank of the invention.

Fig. 2 is a top view of the cryogenic liquid cargo tank of the invention.

Fig. 3 is a three-dimensional view of the cryogenic liquid cargo tank of the invention.

Fig. 4 is an enlarged view of a portion of the cryogenic liquid cargo tank a of the invention.

Figure 5 is an installation view of the cryogenic liquid cargo tank hull of the present invention.

Fig. 6 is a three-dimensional view of the insulating support assembly.

Fig. 7 is a cross-sectional view of insulating support assembly B.

Fig. 8 is an exploded view of the insulating support assembly.

Figure 9 is a cross-sectional view of the hull at the lower Wen Yehuo tank and its support system C.

Fig. 10 is a graph of the distribution trend of the static pressure load in the cabin.

Detailed Description

The low Wen Yehuo storage cabin based on the supporting system of the invention is shown in figure 1, and is supported by the low Wen Yehuo storage cabin 18 and the first supportThe slideway 1, the second supporting slideway 2, the insulating supporting component 4 and the insulating material layer 16. The low Wen Yehuo tank shown in fig. 3 is prismatic and comprises a top surface 7, side surfaces 10, a lower inclined surface 13, a bottom surface 19 (fig. 5), dihedral 9, dihedral 8, and a second support runner 2 and a connecting beam 11 connecting the respective surfaces. The material of the cabin body of the low Wen Yehuo storage cabin 18, the supporting slideway and the connecting beam 11 can be low-temperature-resistant metal materials such as stainless steel, 9% nickel steel, high manganese steel, aluminum alloy and the like. The bottom surface 19 and the lower inclined surface 13 of the metal plate are plane metal plates with the thickness of 12-20mm, the top surface 7, the side surface 10, the dihedral angle 9 and the dihedral angle 8 are arc-shaped metal plates with the thickness of 6-10mm, and the metal plate is 500 m ³ Each arc-shaped plate has a chord length of 3-5m, and the arc-shaped metal plates have certain flexibility, can release the stress vertical to the side surface 10, the top surface 7, the dihedral angle 9 and the dihedral angle 8 of the cabin body, bear the cyclic fatigue load caused by the heat load, and are shown in figure 4. In the centre of the top surface 7 there is arranged a gas-liquid (combination) dome 6 for exchange of liquid and gas outside the cabin.

The top surface and the side surface are provided with strain shrinkage centers (a first fixed collecting end 14, a second fixed collecting end 12 and a third fixed collecting end 5), and the fixed collecting ends are rigidly connected with the ship body. The gas-liquid joint dome 6 is connected with the cabin outer pipe system, so that the cabin top surface takes the gas-liquid joint dome as a contraction point. Because the load born by the lower end of each side wall of the storage tank is larger, the load at the upper end is gradually reduced (see a static pressure load distribution trend chart 10 in the tank), and the whole body is contracted inwards when the temperature of the low-temperature liquid cargo storage tank is reduced, so that the bottom thickness of the tank is increased, the lower end areas of the side walls are relatively reinforced, the bottom of the four side walls are provided with the fixed collecting ends, as shown in fig. 2, the fixed collecting ends of the side walls and the dome fixed collecting ends are positioned on the same central line in the ship length and the ship width direction, the second supporting slideway 2 takes the contraction points (the first fixed collecting end 14, the second fixed collecting end 12 and the third fixed collecting end 5) of each surface as the center to be dispersed outwards in a fan-shaped expansion mode, the top surface 7 and the side surfaces 10 are connected through a plurality of connecting beams 11, and the arc-shaped metal plates are welded between the second supporting slideway 2 and the connecting beams 11. The angle between the supporting slideways is ensured to be 3-5m in chord length of the arc-shaped metal plates, the arc-shaped metal plates with the too small angle are not enough in flexibility, the cabin surface with the too large angle is not enough in bearing capacity, and the specific numerical value is determined according to the analysis result of the actual cabin volume combined with the finite element. The support slide way is formed by a pair of slide ways which are matched with each other, the second support slide way 2 is fixed with the semi-film bulkhead, the first support slide way 1 is fixed with the ship body, the first support slide way 1 and the second support slide way 2 are connected through the insulating support component 4, the low Wen Yehuo storage cabin 18 is connected with the ship body 17, and the installation view of the low Wen Yehuo storage cabin 18 in the ship body 17 is shown in fig. 5. The insulating support assemblies 4 are distributed on the support slide way at equal intervals by taking the solid collecting end as the center, and the number of the insulating support assemblies 4 can be adjusted according to an actual scheme. The supporting slide way and the connecting beam not only increase the integral strength of the low Wen Yehuo storage cabin, but also allow the cabin body to slide relatively with the ship body, release the stress of the cabin body in the sector-shaped expanding direction by taking the solid point as the center, and transfer the load caused by the pressure or weight of the liquid in the cabin.

The insulating support assembly is composed of a plurality of groups of components, including a first insulating component 31, a second insulating component 32, a third insulating component 33 and a fourth insulating component 34 for insulating support, a joint kinematic pair composed of balls 28, rollers 29 and rollers 30 for allowing relative movement between the cabin and the hull and reducing friction, connectors (a first connector 21, a second connector 22, a third connector 23, a fourth connector 24, a fifth connector 25, a sixth connector 26, a seventh connector 27, an eighth connector 35, a ninth connector 36 and a tenth connector 37 for connecting and fixing the groups of components to each other, sealing plates (a first sealing plate 61, a second sealing plate 62, a third sealing plate 63, a fourth sealing plate 64, a fifth sealing plate 65 and a sixth sealing plate 66) for sealing the rollers 29 and the rollers, the insulating support assembly 4 is mounted on the support ramp as shown in fig. 6. The support ramp and the insulating support assembly are cut at B and the cut-away front view is shown in fig. 7. The first insulating part 31 and the third insulating part 33 are fixed to the first support ramp 1 by the third connecting piece 23 and the fourth connecting piece 24 respectively, the second insulating part 32 and the fourth insulating part 34 are aligned with the first insulating part 31 and the third insulating part 33 respectively, the first insulating part 31 and the second insulating part 32 are integrated by the first connecting piece 21 and fixed to the step protruding from the first support ramp 1, the third insulating part 33 and the fourth insulating part 34 are integrated by the second connecting piece 22 and fixed to the step protruding from the other side of the first support ramp 1. The insulating parts are made of heat-insulating high-strength materials, can be laminated wood, composite materials containing glass fibers or carbon fibers or the like, the second support ramp 2 is provided with rollers 29, rolling grooves of the balls 28, in which rolling members are placed by means of a cage. The insulating member 33 is provided with rolling grooves of the rollers 30, in which the rollers 30 are placed by the cage. The roller 29 is used for bearing the horizontal stress of the slideway, the roller 30 and the ball 28 are used for bearing the vertical stress of the slideway, meanwhile, the ball 28 can bear the stress with an included angle direction, and the combined kinematic pair formed by the roller and the ball can reduce the sliding friction force of the first support slideway 1 and the second support slideway 2 and release the stress caused by the deformation of the cabin on the premise of bearing corresponding loads no matter how the support slideway and the heat insulation support are subjected to the working condition. The seventh and tenth connectors 27, 37 secure the second and third seal plates 62, 63 to the fourth insulating member 34 to enclose the rollers and balls therein, the fifth and eighth connectors 25, 35 secure the fifth and sixth seal plates 65, 66 to the second insulating member 32 to enclose the rollers and balls therein, and the sixth and ninth connectors 26, 36 secure the first and fourth seal plates 61, 64 to the first and third insulating members 31, 33 to enclose the rollers therein, each of which is seen in the insulating support assembly exploded view of fig. 8.

Between the bilge (see 5) and the top and side insulating first support slide ways 1 (see the cross section view of the low-temperature liquid cargo storage cabin and the support system C in the ship body, a plate-type insulating material is paved on the inner wall of the ship body to form an insulating material layer 16, wherein the insulating material layer can be reinforced polyurethane, reinforced polyvinyl chloride, reinforced polystyrene or other materials with bearing heat insulation properties, and a common adhesion process can be adopted for paving.

During installation, the first supporting slide way 1 of the side wall is fixed with the inner wall of the ship body through welding, insulating materials of the bottom surface and the side surface are paved, the low Wen Yehuo storage cabin is hoisted after the insulating paving is finished, the bilge is located on the insulating materials, and the supporting assembly is installed after adjustment and alignment. The third insulating part 33 with the roller 30 is first fixed with the first support runner 1 by means of the fourth connection piece 24, the first insulating part 31 is then installed, fixed with the third connection piece 23, and the fourth insulating part 34 with the roller, the ball and the second insulating part 32 with the roller, the ball are then placed, fixed with the second connection piece 22, the first connection piece 21, respectively. Finally, the first sealing plate 61, the second sealing plate 62, the third sealing plate 63, the fourth sealing plate 64, the fifth sealing plate 65 and the sixth sealing plate 66 are fixed by the fifth connecting piece 25, the sixth connecting piece 26, the seventh connecting piece 27, the eighth connecting piece 35, the ninth connecting piece 36 and the tenth connecting piece 37, so that the support members are integrated with the first support slide 1 and the second support slide 2. And after the side surface of the cabin body is connected with the ship body, hoisting the deck surface of the ship body welded with the first support slideway 1, laying insulation after folding, and installing the support assembly in the steps to complete the installation of the whole low Wen Yehuo storage cabin.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should be covered by the protection scope of the present invention by making equivalents and modifications to the technical solution and the inventive concept thereof.

Claims (7)

1. The low Wen Yehuo storage cabin based on the supporting system is characterized in that a cuboid frame supported by a peripheral frame in a ship body comprising the ship cabin is connected with a plurality of first supporting slide ways (1) in a fan-shaped divergent mode upwards by taking the center of a bottom line as a fixed collecting end; the periphery of the rectangular central line which is positioned on the top surface and used as a fixed collecting end is connected with a plurality of first support slide ways (1) in a divergent mode;

the first support slideway (1) is fixed with the inner wall of the ship body through welding; the inner wall of the ship body comprises upper and lower surface cloth insulation material layers (16) except the first support slideway (1);

each first support slideway (1) is parallel, and a second support slideway (2) is arranged inside the cuboid frame; the second support slide ways (2) are connected through arc-shaped or rod-shaped connecting beams (11) at corners to form an internal cuboid structure, and a plane or arc-shaped metal plate is arranged between the second support slide ways (2) and the connecting beams (11) so as to wrap the cuboid structure;

the second support slideway (2) is connected with a film bulkhead for bearing low-temperature liquid;

a plurality of insulating support assemblies (4) are arranged between each group of parallel first support slide ways (1) and each group of parallel second support slide ways (2) at intervals; each insulating support assembly (4) is a sliding block matched with the first support slideway (1) and the second support slideway (2) respectively, and is connected into a whole through a plurality of insulating parts;

the solid collecting end of the top surface is provided with a gas-liquid combined dome (6).

2. The low Wen Yehuo tank based on a support system according to claim 1, characterized in that the surfaces of the first support runner (1), the second support runner (2) and the insulating support assembly (4) sliding relatively are provided with rolling friction balls or balls.

3. The low Wen Yehuo tank based on a support system according to claim 2, wherein the balls or balls are sealed in the insulating support assembly (4) by a sealing plate.

4. The low Wen Yehuo tank based on the supporting system according to claim 1, wherein the first supporting slideway or the second supporting slideway and the connecting beam (11) are made of stainless steel, 9% nickel steel, high manganese steel and aluminum alloy low temperature resistant metal materials.

5. The low Wen Yehuo tank based on a support system according to claim 1, wherein the lower part of the cuboid structure implementing a membrane tank extends out of the cuboid frame inside the hull, the bottom sitting above the deck of the hull; the lower inclined surface (13) of the cuboid structure, which is positioned at the lower bottom surface (19) and the corners, is a metal plate with the thickness of 12-20 mm.

6. The low Wen Yehuo storage compartment based on the support system according to claim 5, wherein the top (7), side (10) and upper corner locations of the cuboid structure are selected from 6-10mm thick metal plates or arc-shaped metal plates.

7. The low Wen Yehuo storage compartment based on support system of claim 6, wherein for 50000m ³ Each arc plate has a chord length of 3-5m.